WA'I I i: STAG I II I i KRS 113 



ha- in. .-.JIM! 111 Minpli linn, .ic.-uracy, ase of 



11.1 dtllal.lllt\. 



These Curley registers are being used extensively by 



litiri.ni Drpaitment* df the United States Government; also 



,.m\ miimcipalilie.. in < n *it)i their -i-\s r ftyftrm* 



.mil sewage disposal pl.t 



ADVANTAGES OF CURLM 'i:\iin. REGISTERS 



The advani.' m Nos. 634 and 634-A are the 



same as those given under Registers Nos. 633 and 636, on 

 pages 102 to 104. 



CONSTRUCTION OF No. 634 GRAPHIC REGISTER 

 (The IMH numbers refer to Fig. 



The base ( 1 ) supports the mechanism of the register. An 



e\ua heavy eight-day clock (2) is geared to two time screws 



^upported at each end. a- -h..\%ii. The clock has two large 



lining springs and has jewelled bearings on the escapement 

 shaft. Mounted on the two screws is the pencil carriage (6) 

 \\lnch moves forward without lost motion, in accord with the 

 turning of the clock shaft, and which ran !>< lifted up from one 

 I HIM i i,m on the screws and placed in another, if desired. The 

 pencil l 1 1 I is held in a pencil holder (5 i \\hich is free to move 

 \ -rurally in a cylinder projecting from tin- upper side of tin- 

 base oi the carriage (4). Tin- pencil holder <~>) is set and 

 clamped \sith a screw, so that the weight of the pencil and the 

 holder presses down against the paper. The recording cylinder 

 (8), on \\hich the paper is placed, is supported at each end. 

 as shown. The sprocket wheel (7) is movable on tin- -\ Under 

 axis and is clamped to the <\ lind.-r (8) by the nut < 1 ~ Two 

 guards (9 ami 10) present the hand from slipping over the 

 -pines on the sprocket \\li.-el, and bolt (13) is used to lock the 



slimier. \\hile (hanging the record sheet. Extending across 

 the face of the recording r\lind.-r (8) is a slot (12), which 

 indicates the point of zero gage height on the record cvlind 



In the standard register of this type the pencil travels along 

 the .slimier in seven days time. It is possible, however, to 

 Milistitute other screws (3) of such a lead that the pencil will 



